<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>dropdown</title>
    <!-- 引入ElementUI样式 -->
    <link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
    <script src="https://unpkg.com/vue/dist/vue.js"></script>
    <!-- 引入ElementUI组件库 -->
    <script src="https://unpkg.com/element-ui/lib/index.js"></script>
</head>
<body>
    <div id="app">
        <el-menu>
            <el-submenu index="1">
                <template slot="title">
                    <i class="el-icon-location"></i>
                    <span slot="title">导航一</span>
                </template>
                <el-menu-item>选项一</el-menu-item>
                <el-menu-item>选项二</el-menu-item>
                <el-menu-item>选项三</el-menu-item>
            </el-submenu>
            <el-submenu index="2">
                <template slot="title">
                    <i class="el-icon-menu"></i>
                    <span slot="title">导航二</span>
                </template>
                <el-menu-item>选项一</el-menu-item>
                <el-menu-item>选项二</el-menu-item>
                <el-menu-item>选项三</el-menu-item>
            </el-submenu>
        </el-menu>
    </div>

    <script>
        new Vue({
           el:"#app"
        });
    </script>
</body>
</html>